diff --git a/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java b/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
index 4f09422dc..5341c4a0e 100644
--- a/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
+++ b/iFish7/src/main/java/com/ifish/activity/MainTabActivity.java
@@ -19,6 +19,7 @@ import android.os.Handler;
 import android.text.TextUtils;
 import android.util.Log;
 import android.util.SparseArray;
+import android.view.KeyEvent;
 import android.view.View;
 import android.view.Window;
 import android.widget.Button;
@@ -582,6 +583,9 @@ public class MainTabActivity extends BaseFragmentActivity {
         DeviceOffLine();
     }
 
+
+
+
     private void userActivitiesCount() {
         if (userActivitiesFlag) {
             userActivitiesFlag = false;
@@ -699,4 +703,61 @@ public class MainTabActivity extends BaseFragmentActivity {
     }
 
 
+    private long exitTime = 0;
+
+    @Override
+    public boolean onKeyDown(int keyCode, KeyEvent event) {
+        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
+            if ((System.currentTimeMillis() - exitTime) > 3000) {
+                ToastUtil.show(this,"再按一次退出程序");
+                exitTime = System.currentTimeMillis();
+                return true;
+            } else {
+                ActivityManager.getInstance().exit();
+                return super.onKeyDown(keyCode, event);
+            }
+        }
+        return super.onKeyDown(keyCode, event);
+    }
+
+    public void onEventMainThread(EventBean event) {
+        if (event!=null){
+            switch (event.index) {
+                case -1:
+                    startDownTimer();
+                    break;
+                case 1:
+                    closeDownTimer();
+                    break;
+                default:
+
+                    break;
+            }
+        }
+    }
+
+    CountDownTimer countDownTimer;
+    public  void  startDownTimer(){
+        closeDownTimer();
+        countDownTimer = new CountDownTimer(900000,1000) {
+            @Override
+            public void onTick(long l) {
+                L.i("----------------------"+l/1000);
+            }
+
+            @Override
+            public void onFinish() {
+                ActivityManager.getInstance().exit();
+            }
+        };
+
+        countDownTimer.start();
+    }
+
+    public void  closeDownTimer(){
+        if (countDownTimer!=null){
+            countDownTimer.cancel();
+            countDownTimer = null;
+        }
+    }
 }
diff --git a/iFish7/src/main/java/com/ifish/basebean/EventBean.java b/iFish7/src/main/java/com/ifish/basebean/EventBean.java
index 44a19179b..c3e221bc6 100644
--- a/iFish7/src/main/java/com/ifish/basebean/EventBean.java
+++ b/iFish7/src/main/java/com/ifish/basebean/EventBean.java
@@ -12,7 +12,7 @@ public class EventBean {
     public   int index = 0;
     //  jiaxblue
 //    public static  String BLUETOOTH_START_SCAN = "start_scan";
-//    public  static  String BLUETOOTH_STOP_SCAN = "stop_scan";
+    public  static  String BACK_STAGE = "back_stage";
     public  static  String TAB_INDEX = "tab_index";
     public  static  String LINK_FINISH = "link_finish";
     public  static  String CHANGE_DEVICE_NAME = "change_device_name";
diff --git a/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java b/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
index 997ea251f..d2b0246a7 100644
--- a/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
+++ b/iFish7/src/main/java/com/ifish/baseclass/BaseApplication.java
@@ -92,69 +92,62 @@ public class BaseApplication extends MultiDexApplication {
                 .setScanTimeOut(30000)              // 扫描超时时间30S，可选，默认10秒；小于等于0表示不限制扫描时间
                 .build();
         BleManager.getInstance().initScanRule(scanRuleConfig);
+        registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
+            @Override
+            public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle bundle) {
 
+            }
 
-//        registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
-//            @Override
-//            public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle bundle) {
-//
-//            }
-//
-//            @Override
-//            public void onActivityStarted(@NonNull Activity activity) {
-//                if (count==0){
-//                    ToastUtil.show(app,"aaa"+count);
-//                    L.i("jjia-x-----3-----"+count);
+            @Override
+            public void onActivityStarted(@NonNull Activity activity) {
+                if (count==0){
+                    EventBean eventBean = new EventBean(EventBean.BACK_STAGE,1);
+                    EventBus.getDefault().post(eventBean);
 //                    Activity activityName = ActivityManager.getInstance().lastActivity();
 //                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
-//                        L.i("jjia-x-----4-----"+count);
-//                        //  jiaxblue
-//                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_START_SCAN);
-//                        EventBus.getDefault().post(eventBean);
+//                        //  jiablue
+////                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_START_SCAN);
+////                        EventBus.getDefault().post(eventBean);
 //                    }
-//                }
-//                count++;
-//
-//            }
-//
-//            @Override
-//            public void onActivityResumed(@NonNull Activity activity) {
-//
-//            }
-//
-//            @Override
-//            public void onActivityPaused(@NonNull Activity activity) {
-//
-//            }
-//
-//            @Override
-//            public void onActivityStopped(@NonNull Activity activity) {
-//                count--;
-//                ToastUtil.show(app,"bbbb"+count);
-//                L.i("jjia-x-----0-----"+count);
-//                if (count==0){
+                }
+                count++;
+
+            }
+
+            @Override
+            public void onActivityResumed(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivityPaused(@NonNull Activity activity) {
+
+            }
+
+            @Override
+            public void onActivityStopped(@NonNull Activity activity) {
+                count--;
+                if (count==0){
+                    EventBean eventBean = new EventBean(EventBean.BACK_STAGE,-1);
+                    EventBus.getDefault().post(eventBean);
 //                    Activity activityName = ActivityManager.getInstance().lastActivity();
 //                    if (activityName!=null && activityName.toString().contains("MainTabActivity")){
-//                        L.i("jjia-x-----1-----"+count);
-//                        //  jiaxblue
-//                        EventBean eventBean = new EventBean(EventBean.BLUETOOTH_STOP_SCAN);
-//                        EventBus.getDefault().post(eventBean);
+//                        //  jiablue
+//
 //                    }
-//                }
-//            }
-//
-//            @Override
-//            public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle bundle) {
-//
-//            }
-//
-//            @Override
-//            public void onActivityDestroyed(@NonNull Activity activity) {
-//
-//            }
-//        });
+                }
+            }
 
+            @Override
+            public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle bundle) {
 
+            }
+
+            @Override
+            public void onActivityDestroyed(@NonNull Activity activity) {
+
+            }
+        });
     }
 
     /**